Dobby cord terminal



April 7 1942. 2 LARK 2,279,132

DOBBY CORD TERMINAL Original Filed June 22, 19:59

Patented Apr. 7, 1942 DOBBY CORD TERMINAL I Breckinridge T. Clark,Danielson, Conn, assignor to E. H. Jacobs Mfg. 00., Inc., Danielson,Conn., a corporation of Connecticut Original application June 22, 1939,Serial No. 280,509, now Patent No. 2,240,982, dated May 6, 1941. Dividedand this application March 6, 1941, Serial No. 382,092

1 Claim.

My present invention is a divisional of my prior application 280,509,filed June 22, 1939, now Patent No. 2,240,982, dated May 6, 1941, on oneform of my Die-cast dobby cord terminal invention.

The advantages of die-casting a terminal at each end of a dobby cord arenow well recognized, and the important features of my said pendingimproved constructions and methods consist in the utilization of ahardened steel, wear-resisting eyelet, U-shaped, or hook member unitedand bonded with both the wire core, or heart, and with a braided sheathor covering.

My present invention aims to improve and perfect this feature and toprovide a terminal structure particularly suited for the die-castingoperation, although it can be likewise formed by a hot metal molding orwelding operation.

In the present construction I provide the wearresistant hardened steelor loop member with a pair of extending shanks or arms adapted to lay inclose contact with the projecting end of the reinforcing wire core of adobby cord, such as is shown in said prior Patent 2,152,397, andthereupon to firmly bond the extending arms and wire together by flowinga mass of molten metal therearound, preferably by the quick and simpledie-cast method.

A further and important feature consists in an arrangement whereby mypresent improvement has cooperating means to bind the two arms of theeyelet member with the core, as well as to interlock the same and themolten metal used for the bonding action.

In carrying out this latter feature, I prefer to pre-form the extendingshank or arm members with grooves or other irregularities which willpermit both the core and interlocked shank or arms and the molten metalto flow therein and thus firmly to bind same with the metal as indiecasting, welding, molding, or the like, as well also as to morefirmly bind the arms of the eyelet member to and about the reinforcingwire core.

A further important feature consists in the snugness and compactnesswith which my dobby cord terminal can be embodied, by having theplurality of arms of the eyelet member straddling and telescoping withthe projecting wire of the reinforcing core, and thus also save thequantity of die-cast metal employed.

While I may, if desired, utilize one extending arm or portion from theeyelet and interlock same with the reinforcing wire core, I prefer toutilize two or more extending arms from the eyelet member which straddleand interlock with the wire of the cord.

Referring to the drawing illustrating preferred embodiments of mypresent invention:

Fig. 1 illustrates a modified form wherein the wire end is interlockedwith the shank of the eyelet member;

Fig. 2 illustrates the same in cross-section with the die-cast moltenmetal completing the union, and

Fig. 3 is a view of the completed terminal.

As shown in the drawing, a dobby cord section comprising a braidedsheath I and a wire core 2 of the usual type is prepared by removing aportion of the sheath I from the end to expose the projecting wire core2. An attaching hard metal hook or eyelet member I5 has threads,corrugations, roughened surfaces, or the like around which the wire core2 of the dobby cord I may be wound in firm contact therewith, asindicated at l8, thus giving a firm metal-to-metal connection betweenthe eyelet member 15 and the core 2.,

The molten metal is then applied by die-casing, as shown at l0, firmlyenclosing, uniting, binding, and interlocking the metal about thewrapped core 2 and shank l6 of the eyelet member, and, furthermore,forming simultaneously a ferrule 12.

Thus a compact, strong, firm, rigid, interlocking construction isobtained, firmly binding the wearresisting member l5 directly to thewire core 2 and to the enclosing sheath I. This terminal is applied toeach end of the dobby cord, as will be readily understood.

As clearly shown in Figs. 1, 2, and 3, a strong positive interlockingstructure is illustrated, wherein the wear-resisting or hardenedsteelengaging member is positively interlocked with the wire core. Thus,I have shown a hook I5 having a screw-threaded shank l6 around which theprojecting end portion l8 of a wire core is wrapped, as clearly shown inFigs. 2 and 3.

The hook 15 can, of course, be an eyelet, if desired, and the hook canbe closed against the shank to make a loop, if desired.

With this construction, the molten metal I0 is then applied by molding,welding, or die-casting as above explained, and the terminal completed,providing a very strong interlocking construction between the wire ofthe core 2 and the member I 5.

It will be noted that I have obtained a, strong, compact, firminterlocking construction with the hook, eyelet or U-shaped member ofwear-resisting material, preferably hardened steel, and with the samehaving a shank, or shanks, in direct contact with the wirecore of thedobby cord 6 exposed for an appropriate length for such interlocking andthe completion of the union between the eyelet, hook, or the like, and ashank formed with a j V plurality of grooves, the reinforcing wireprojecting from the end of the sheath and interlocking with the saidshank by engaging the grooves of the shank of the metallic fastener, andmolten metal covering, protecting, and bonding the interlocked portion"of the shank and wire, and forming a ferrule on the end portion of thesheath;

BRECICNRIDGE T. CLARK.

